P1233/3: Failure B With Start Assist Relay - Yanmar 3TNV82A Troubleshooting Manual

FAILURE DIAGNOSIS

(2) P1233/3: Failure B with Start Assist Relay

DTC P1233/3
DTC Detecting Conditions
1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator
1. Key switch ON.
2. Make an assessment logically as to followings.E-ECU detects the start assist
relay turning OFF during the command to turn ON the start assist relay.
3. One flash followed by five flashes.
Movement at Error occurrence
Error Mode [Run As Is]:
After detecting the error, the system lets the engine continue to run without any
restrictions.
Run restricted? No.
Recovery No.
Conditions
Remarks
Estimation of Failure cause/Error condition
• The connector may not be properly connected.
• Wiring defect of the harness
The start assist relay wiring may be short-circuited with GND (*NOTE).
•
• The start assist relay may be faulty.
Inner wiring of the start assist relaymay be short-circuited with GND (*NOTE).
•
*NOTE) If the start assist relay wire is short-circuited with GND, the E-ECU's power supply line fuse 10A
might be blown.Also the E-ECU internal circuitry may be faulty.In this case, the E-ECU may fail to
detect/indicate the error, and to store the error history.
• The E-ECU internal circuitry may be faulty.
1-74
DTCs (Diagnostic Trouble Codes) General Description
Failure B with Start Assist Relay
Check points
Connector
Harness
Start Assist Relay
E-ECU
TNV DI Service Manual